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lang-py
collections.abc.Iteratordirectly instead; see docs.python.org/3/library/typing.html#typing.Iterator. By the way, the minimum needed version to run this isn't3.10due to typing.Type | Nonein place ofOptional[Type]But this does not apply here. So, you're right python 3.10 is not required. PEP 585 confirms your suggestion, so I've updated my answer.